The war was a time of change for the treatment of injuries and illness. Injured and sick soldiers needed to be treated quickly so they could go back to fighting as soon as possible. Casualty ...

Has the U.S. military forgotten how to fight in the snow? That's what some experts say, and the Pentagon is worried they ...

This story originally appeared in the August 2014 issue of National Geographic magazine as "The Hidden World of the Great War ... but as one French soldier wrote home, “vermin devour us ...